This is a division we can write those numbers as fractions to make it simpler
0.16=[tex]\frac{16}{100}[/tex]
0.064=[tex]\frac{64}{1000}[/tex]
when we divide two fractions we can multiply the divided with the inverse divisor
[tex]\frac{16}{100}*\frac{1000}{64}[/tex]
we simplify
[tex]\frac{1}{1} *\frac{10}{4}[/tex]
which is equal to
[tex]\frac{10}{4}[/tex]
or
[tex]\frac{5}{2}[/tex]
we can leave it like this or divde to get
2.5
